It sounds like the oil pressure is low. If the car has high mileage, this may be either a failed oil pump or a clogged oil pickup, or may be a clogged oil filter. You will need to drop the oil pan and see what is happening. IMPORTANT: If you attempt to drive the vehicle with a low oil pressure condition, the engine may seize, rendering the reason for the low oil pressure academic.
It sounds like you have a bad MAF (Mass Airflow Sensor). This is in your air inlet tube, pull this out and check to see if there is any corrosion on it. If is one that has a coiled exposed wire, then ensure that the wire is not broke.
SOURCE: LIGHT FLICKERS, BATTERY DRAINS WHEN DRIVING
check the altenator. Jump the car. Disconnect the batery terminals. If the car stays running, its not the alt. If it dies, it is
SOURCE: car is jerking while driving on the highway and
the steering wheel gets stiff, because the car died and your power steering pump is stopped. beeing a 1994, you may have a fuel pump issue (nissan had campaign on those), but most likely no longer available to you, because of the age of the car. they purge campaigns out as years go on. you could have an issue with distributor. oil leaks pass the seal and gets inside of the distributor assembly on the signal plate (internal component of distribitor) and messes with the ignition system/spark plugs. you may also have a broken intake gasket. When was the last time you did a tune up?? changed plugs, fuel filter and so on???
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